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Hello.

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Welcome back.

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So in this lesson we going to see how to create functions and in Python.

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So this was our last project.

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Let's create a new project or a new script from our click file and come to New file then our press control

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is to save and I'll save this is number six under school functions like this.

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Once that is done we can close this now.

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So as we saw earlier Python doesn't use the curly braces we find in our programming languages like C

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actually Python uses blocks and it's able to use blocks through indentation and its pacing is the same

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with functions functions over here on surrounded by Kelly braces to indicate a block but rather indented

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in a particular way.

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So let's start with the first example.

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I'm going to put a comment up here.

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I'll call this example one example one and let's give it a name.

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This is going to be a simple function to create a function.

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We start with the keyword the F death and then space and then we type the function name so we can call

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this simple on the school function like this and we open and close the braces.

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Normal stuff here.

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So the function has no argument.

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So we open and close just like this.

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If we were to write this function in C we might put a void here or something.

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But in Python no argument to just open and close.

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Once that is done we put a call on here and then we hit enter when we hit enter it to automatically

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indent for us.

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So once this comes once we've defined the function.

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Now we can put the contents of the function what we want is function to do we want this function to

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print a simple statement we can say print.

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And over here we can say this is a simple function and we can press control as to save and then click

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right here to run and see what we have

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so nothing is happening.

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It's because we've not code to function.

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So it's quite a function we can just bring the function name here.

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Simple on the school function like this

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just like in any other language.

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This the way we call functions once that's done we hit enter and function as run.

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This is a simple function.

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If we had to add more content to the function we have to follow this indentation line this line we have

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to go vertically like this.

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But if we want to come out of the function we just come out like this would come out of the indentation

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as well so we can come out and say simple functions such that when we run it would automatically call

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the function like this and then we press control to save the click over her and a click here to run

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the module and I can see this is a simple function it's called the function automatically.

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Right.

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So we can clean this too let's go to example number two let's see a function that takes arguments to

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just bring this here I'll put a comment to your example number two and I'll call this function arguments.

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So we do the same way.

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We start by defining it de F and we can give this function a name such as a school in this country do

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for country on the score for let's say we want this function to perform its simple task we want to pass

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it to argument concrete and Copy tool and we want the function to print the capital of this country

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is this so we can just bring it here we can see the first argument is country and in the same way we

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don't need to give that type Yeah in other languages we might need to see if the argument number one

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is a string an integer a float but as we saw earlier in python you declare variables without assigning

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them any types so we can say come talk over here and put a semicolon here hit enter and we can come

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down here and a print and then we open our quotation marks the capital of percentage s is percent yes

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how about this we can come out of the sentence and put a percentage sign here and then open braces and

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say column tree comma copy capital like this and then let's see how it runs so let's call this function

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down here way to hit enter and hit enter again and come out of the function and see concrete.

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Now let's just go call it from the shell so right.

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Control as to save we run here

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and it's run so we can call our new function and see a country on the school info.

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And then we can see it over here let's say we pass it a country like Ghana and then capital of Accra.

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Okay.

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So what I just did is I did pass a string I've just passed you know a different type to pass this our

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function accepts strings although we didn't define country string country string capital.

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It does accept strings.

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So we have to pass it country on underscore underscore info and then put a country here and then comma

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put a copy to her and then we hit enter and I can see the capital of colonized Agra.

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And then we can do another one.

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We can say country strikes again.

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You can destroy it with any country.

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Just pull countries UK capital is London.

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Let's see.

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And indeed the capital of U.K. is London.

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So this this how to write functions with arguments.

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So let's see the third type of function you would see.

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We've seen the simple function.

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We've seen a function that accepts argument.

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The third function will be a function that returns values or returns something.

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If you may.

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So I'll just come down here and call this example number three

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quarters function with return value function with a return value like this

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and we can come here and define a function.

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So we say the F like always and this function we can see and underscore with this assuming we want to

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function that adds to numbers so we can pass the first number.

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And then the second number and then we'll come out here we put some called on hit enter and we can't

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see a return.

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A plus B.

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Right.

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So we'll press control as to save click Run.

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And then we run the module and we can see out of this.

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That's the name of the function.

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What we want to artless you want about 20 comma 30 let's hit enter.

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And of course the answer is 50.

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So this how to create functions in Python.

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Very simple very straightforward.

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And this all there is for this very short lesson if you have any questions at all do send me a message

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or leave it in the questions area.